606 lines
16 KiB
JavaScript
606 lines
16 KiB
JavaScript
// A simple implementation of make-array
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function makeArray(subject) {
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return Array.isArray(subject) ? subject : [subject];
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}
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const EMPTY = '';
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const SPACE = ' ';
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const ESCAPE = '\\';
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const REGEX_TEST_BLANK_LINE = /^\s+$/;
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const REGEX_INVALID_TRAILING_BACKSLASH = /(?:[^\\]|^)\\$/;
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const REGEX_REPLACE_LEADING_EXCAPED_EXCLAMATION = /^\\!/;
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const REGEX_REPLACE_LEADING_EXCAPED_HASH = /^\\#/;
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const REGEX_SPLITALL_CRLF = /\r?\n/g;
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// /foo,
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// ./foo,
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// ../foo,
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// .
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// ..
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const REGEX_TEST_INVALID_PATH = /^\.*\/|^\.+$/;
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const SLASH = '/';
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// Do not use ternary expression here, since "istanbul ignore next" is buggy
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let TMP_KEY_IGNORE = 'node-ignore';
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/* istanbul ignore else */
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if (typeof Symbol !== 'undefined') {
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TMP_KEY_IGNORE = Symbol.for('node-ignore');
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}
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const KEY_IGNORE = TMP_KEY_IGNORE;
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const define = (object, key, value) =>
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Object.defineProperty(object, key, { value });
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const REGEX_REGEXP_RANGE = /([0-z])-([0-z])/g;
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const RETURN_FALSE = () => false;
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// Sanitize the range of a regular expression
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// The cases are complicated, see test cases for details
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const sanitizeRange = (range) =>
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range.replace(REGEX_REGEXP_RANGE, (match, from, to) =>
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from.charCodeAt(0) <= to.charCodeAt(0) ?
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match
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// Invalid range (out of order) which is ok for gitignore rules but
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// fatal for JavaScript regular expression, so eliminate it.
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: EMPTY
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);
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// See fixtures #59
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const cleanRangeBackSlash = (slashes) => {
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const { length } = slashes;
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return slashes.slice(0, length - (length % 2));
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};
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// > If the pattern ends with a slash,
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// > it is removed for the purpose of the following description,
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// > but it would only find a match with a directory.
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// > In other words, foo/ will match a directory foo and paths underneath it,
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// > but will not match a regular file or a symbolic link foo
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// > (this is consistent with the way how pathspec works in general in Git).
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// '`foo/`' will not match regular file '`foo`' or symbolic link '`foo`'
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// -> ignore-rules will not deal with it, because it costs extra `fs.stat` call
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// you could use option `mark: true` with `glob`
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// '`foo/`' should not continue with the '`..`'
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const REPLACERS = [
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[
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// remove BOM
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// TODO:
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// Other similar zero-width characters?
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/^\uFEFF/,
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() => EMPTY,
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],
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// > Trailing spaces are ignored unless they are quoted with backslash ("\")
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[
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// (a\ ) -> (a )
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// (a ) -> (a)
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// (a ) -> (a)
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// (a \ ) -> (a )
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/((?:\\\\)*?)(\\?\s+)$/,
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(_, m1, m2) => m1 + (m2.indexOf('\\') === 0 ? SPACE : EMPTY),
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],
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// replace (\ ) with ' '
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// (\ ) -> ' '
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// (\\ ) -> '\\ '
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// (\\\ ) -> '\\ '
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[
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/(\\+?)\s/g,
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(_, m1) => {
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const { length } = m1;
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return m1.slice(0, length - (length % 2)) + SPACE;
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},
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],
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// Escape metacharacters
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// which is written down by users but means special for regular expressions.
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// > There are 12 characters with special meanings:
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// > - the backslash \,
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// > - the caret ^,
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// > - the dollar sign $,
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// > - the period or dot .,
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// > - the vertical bar or pipe symbol |,
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// > - the question mark ?,
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// > - the asterisk or star *,
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// > - the plus sign +,
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// > - the opening parenthesis (,
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// > - the closing parenthesis ),
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// > - and the opening square bracket [,
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// > - the opening curly brace {,
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// > These special characters are often called "metacharacters".
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[/[\\$.|*+(){^]/g, (match) => `\\${match}`],
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[
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// > a question mark (?) matches a single character
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/(?!\\)\?/g,
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() => '[^/]',
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],
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// leading slash
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[
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// > A leading slash matches the beginning of the pathname.
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// > For example, "/*.c" matches "cat-file.c" but not "mozilla-sha1/sha1.c".
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// A leading slash matches the beginning of the pathname
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/^\//,
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() => '^',
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],
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// replace special metacharacter slash after the leading slash
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[/\//g, () => '\\/'],
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[
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// > A leading "**" followed by a slash means match in all directories.
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// > For example, "**/foo" matches file or directory "foo" anywhere,
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// > the same as pattern "foo".
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// > "**/foo/bar" matches file or directory "bar" anywhere that is directly
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// > under directory "foo".
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// Notice that the '*'s have been replaced as '\\*'
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/^\^*\\\*\\\*\\\//,
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// '**/foo' <-> 'foo'
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() => '^(?:.*\\/)?',
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],
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// starting
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[
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// there will be no leading '/'
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// (which has been replaced by section "leading slash")
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// If starts with '**', adding a '^' to the regular expression also works
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/^(?=[^^])/,
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function startingReplacer() {
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// If has a slash `/` at the beginning or middle
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return !/\/(?!$)/.test(this) ?
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// > Prior to 2.22.1
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// > If the pattern does not contain a slash /,
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// > Git treats it as a shell glob pattern
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// Actually, if there is only a trailing slash,
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// git also treats it as a shell glob pattern
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// After 2.22.1 (compatible but clearer)
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// > If there is a separator at the beginning or middle (or both)
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// > of the pattern, then the pattern is relative to the directory
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// > level of the particular .gitignore file itself.
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// > Otherwise the pattern may also match at any level below
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// > the .gitignore level.
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'(?:^|\\/)'
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// > Otherwise, Git treats the pattern as a shell glob suitable for
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// > consumption by fnmatch(3)
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: '^';
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},
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],
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// two globstars
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[
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// Use lookahead assertions so that we could match more than one `'/**'`
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/\\\/\\\*\\\*(?=\\\/|$)/g,
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// Zero, one or several directories
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// should not use '*', or it will be replaced by the next replacer
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// Check if it is not the last `'/**'`
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(_, index, str) =>
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index + 6 < str.length ?
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// case: /**/
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// > A slash followed by two consecutive asterisks then a slash matches
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// > zero or more directories.
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// > For example, "a/**/b" matches "a/b", "a/x/b", "a/x/y/b" and so on.
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// '/**/'
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'(?:\\/[^\\/]+)*'
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// case: /**
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// > A trailing `"/**"` matches everything inside.
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// #21: everything inside but it should not include the current folder
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: '\\/.+',
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],
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// normal intermediate wildcards
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[
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// Never replace escaped '*'
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// ignore rule '\*' will match the path '*'
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// 'abc.*/' -> go
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// 'abc.*' -> skip this rule,
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// coz trailing single wildcard will be handed by [trailing wildcard]
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/(^|[^\\]+)(\\\*)+(?=.+)/g,
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// '*.js' matches '.js'
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// '*.js' doesn't match 'abc'
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(_, p1, p2) => {
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// 1.
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// > An asterisk "*" matches anything except a slash.
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// 2.
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// > Other consecutive asterisks are considered regular asterisks
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// > and will match according to the previous rules.
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const unescaped = p2.replace(/\\\*/g, '[^\\/]*');
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return p1 + unescaped;
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},
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],
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[
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// unescape, revert step 3 except for back slash
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// For example, if a user escape a '\\*',
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// after step 3, the result will be '\\\\\\*'
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/\\\\\\(?=[$.|*+(){^])/g,
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() => ESCAPE,
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],
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[
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// '\\\\' -> '\\'
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/\\\\/g,
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() => ESCAPE,
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],
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[
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// > The range notation, e.g. [a-zA-Z],
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// > can be used to match one of the characters in a range.
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// `\` is escaped by step 3
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/(\\)?\[([^\]/]*?)(\\*)($|\])/g,
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(match, leadEscape, range, endEscape, close) =>
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leadEscape === ESCAPE ?
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// '\\[bar]' -> '\\\\[bar\\]'
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`\\[${range}${cleanRangeBackSlash(endEscape)}${close}`
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: close === ']' ?
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endEscape.length % 2 === 0 ?
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// A normal case, and it is a range notation
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// '[bar]'
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// '[bar\\\\]'
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`[${sanitizeRange(range)}${endEscape}]`
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// Invalid range notaton
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// '[bar\\]' -> '[bar\\\\]'
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: '[]'
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: '[]',
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],
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// ending
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[
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// 'js' will not match 'js.'
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// 'ab' will not match 'abc'
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/(?:[^*])$/,
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// WTF!
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// https://git-scm.com/docs/gitignore
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// changes in [2.22.1](https://git-scm.com/docs/gitignore/2.22.1)
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// which re-fixes #24, #38
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// > If there is a separator at the end of the pattern then the pattern
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// > will only match directories, otherwise the pattern can match both
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// > files and directories.
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// 'js*' will not match 'a.js'
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// 'js/' will not match 'a.js'
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// 'js' will match 'a.js' and 'a.js/'
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(match) =>
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/\/$/.test(match) ?
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// foo/ will not match 'foo'
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`${match}$`
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// foo matches 'foo' and 'foo/'
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: `${match}(?=$|\\/$)`,
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],
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// trailing wildcard
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[
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/(\^|\\\/)?\\\*$/,
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(_, p1) => {
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const prefix =
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p1 ?
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// '\^':
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// '/*' does not match EMPTY
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// '/*' does not match everything
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// '\\\/':
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// 'abc/*' does not match 'abc/'
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`${p1}[^/]+`
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// 'a*' matches 'a'
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// 'a*' matches 'aa'
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: '[^/]*';
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return `${prefix}(?=$|\\/$)`;
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},
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],
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];
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// A simple cache, because an ignore rule only has only one certain meaning
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const regexCache = Object.create(null);
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// @param {pattern}
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const makeRegex = (pattern, ignoreCase) => {
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let source = regexCache[pattern];
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if (!source) {
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source = REPLACERS.reduce(
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(prev, [matcher, replacer]) =>
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prev.replace(matcher, replacer.bind(pattern)),
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pattern
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);
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regexCache[pattern] = source;
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}
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return ignoreCase ? new RegExp(source, 'i') : new RegExp(source);
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};
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const isString = (subject) => typeof subject === 'string';
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// > A blank line matches no files, so it can serve as a separator for readability.
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const checkPattern = (pattern) =>
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pattern &&
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isString(pattern) &&
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!REGEX_TEST_BLANK_LINE.test(pattern) &&
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!REGEX_INVALID_TRAILING_BACKSLASH.test(pattern) &&
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// > A line starting with # serves as a comment.
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pattern.indexOf('#') !== 0;
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const splitPattern = (pattern) => pattern.split(REGEX_SPLITALL_CRLF);
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class IgnoreRule {
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constructor(origin, pattern, negative, regex) {
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this.origin = origin;
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this.pattern = pattern;
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this.negative = negative;
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this.regex = regex;
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}
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}
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const createRule = (pattern, ignoreCase) => {
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const origin = pattern;
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let negative = false;
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// > An optional prefix "!" which negates the pattern;
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if (pattern.indexOf('!') === 0) {
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negative = true;
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pattern = pattern.substr(1);
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}
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pattern = pattern
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// > Put a backslash ("\") in front of the first "!" for patterns that
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// > begin with a literal "!", for example, `"\!important!.txt"`.
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.replace(REGEX_REPLACE_LEADING_EXCAPED_EXCLAMATION, '!')
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// > Put a backslash ("\") in front of the first hash for patterns that
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// > begin with a hash.
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.replace(REGEX_REPLACE_LEADING_EXCAPED_HASH, '#');
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const regex = makeRegex(pattern, ignoreCase);
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return new IgnoreRule(origin, pattern, negative, regex);
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};
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const throwError = (message, Ctor) => {
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throw new Ctor(message);
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};
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const checkPath = (path, originalPath, doThrow) => {
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if (!isString(path)) {
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return doThrow(
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`path must be a string, but got \`${originalPath}\``,
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TypeError
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);
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}
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// We don't know if we should ignore EMPTY, so throw
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if (!path) {
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return doThrow(`path must not be empty`, TypeError);
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}
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// Check if it is a relative path
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if (checkPath.isNotRelative(path)) {
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const r = '`path.relative()`d';
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return doThrow(
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`path should be a ${r} string, but got "${originalPath}"`,
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RangeError
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);
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}
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return true;
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};
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const isNotRelative = (path) => REGEX_TEST_INVALID_PATH.test(path);
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checkPath.isNotRelative = isNotRelative;
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checkPath.convert = (p) => p;
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class Ignore {
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constructor({
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ignorecase = true,
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ignoreCase = ignorecase,
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allowRelativePaths = false,
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} = {}) {
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define(this, KEY_IGNORE, true);
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this._rules = [];
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this._ignoreCase = ignoreCase;
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this._allowRelativePaths = allowRelativePaths;
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this._initCache();
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}
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_initCache() {
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this._ignoreCache = Object.create(null);
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this._testCache = Object.create(null);
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}
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_addPattern(pattern) {
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// #32
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if (pattern && pattern[KEY_IGNORE]) {
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this._rules = this._rules.concat(pattern._rules);
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this._added = true;
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return;
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}
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if (checkPattern(pattern)) {
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const rule = createRule(pattern, this._ignoreCase);
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this._added = true;
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this._rules.push(rule);
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}
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}
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// @param {Array<string> | string | Ignore} pattern
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add(pattern) {
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this._added = false;
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makeArray(isString(pattern) ? splitPattern(pattern) : pattern).forEach(
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this._addPattern,
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this
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);
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// Some rules have just added to the ignore,
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// making the behavior changed.
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if (this._added) {
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this._initCache();
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}
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return this;
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}
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// legacy
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addPattern(pattern) {
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return this.add(pattern);
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}
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// | ignored : unignored
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// negative | 0:0 | 0:1 | 1:0 | 1:1
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// -------- | ------- | ------- | ------- | --------
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// 0 | TEST | TEST | SKIP | X
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// 1 | TESTIF | SKIP | TEST | X
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// - SKIP: always skip
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// - TEST: always test
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// - TESTIF: only test if checkUnignored
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// - X: that never happen
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// @param {boolean} whether should check if the path is unignored,
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// setting `checkUnignored` to `false` could reduce additional
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// path matching.
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// @returns {TestResult} true if a file is ignored
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_testOne(path, checkUnignored) {
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let ignored = false;
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let unignored = false;
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this._rules.forEach((rule) => {
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const { negative } = rule;
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if (
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(unignored === negative && ignored !== unignored) ||
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(negative && !ignored && !unignored && !checkUnignored)
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) {
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return;
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}
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const matched = rule.regex.test(path);
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if (matched) {
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ignored = !negative;
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unignored = negative;
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}
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});
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return {
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ignored,
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unignored,
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};
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}
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// @returns {TestResult}
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_test(originalPath, cache, checkUnignored, slices) {
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const path =
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originalPath &&
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// Supports nullable path
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checkPath.convert(originalPath);
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checkPath(
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path,
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originalPath,
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this._allowRelativePaths ? RETURN_FALSE : throwError
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);
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return this._t(path, cache, checkUnignored, slices);
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}
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_t(path, cache, checkUnignored, slices) {
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if (path in cache) {
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return cache[path];
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}
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if (!slices) {
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// path/to/a.js
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// ['path', 'to', 'a.js']
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slices = path.split(SLASH);
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}
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slices.pop();
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// If the path has no parent directory, just test it
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if (!slices.length) {
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return (cache[path] = this._testOne(path, checkUnignored));
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}
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const parent = this._t(
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slices.join(SLASH) + SLASH,
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cache,
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checkUnignored,
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slices
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);
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// If the path contains a parent directory, check the parent first
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return (cache[path] =
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|
parent.ignored ?
|
|
// > It is not possible to re-include a file if a parent directory of
|
|
// > that file is excluded.
|
|
parent
|
|
: this._testOne(path, checkUnignored));
|
|
}
|
|
|
|
ignores(path) {
|
|
return this._test(path, this._ignoreCache, false).ignored;
|
|
}
|
|
|
|
createFilter() {
|
|
return (path) => !this.ignores(path);
|
|
}
|
|
|
|
filter(paths) {
|
|
return makeArray(paths).filter(this.createFilter());
|
|
}
|
|
|
|
// @returns {TestResult}
|
|
test(path) {
|
|
return this._test(path, this._testCache, true);
|
|
}
|
|
}
|
|
|
|
const factory = (options) => new Ignore(options);
|
|
|
|
const isPathValid = (path) =>
|
|
checkPath(path && checkPath.convert(path), path, RETURN_FALSE);
|
|
|
|
factory.isPathValid = isPathValid;
|
|
|
|
// Fixes typescript
|
|
factory.default = factory;
|
|
|
|
module.exports = factory;
|
|
|
|
// Windows
|
|
// --------------------------------------------------------------
|
|
/* istanbul ignore if */
|
|
if (
|
|
// Detect `process` so that it can run in browsers.
|
|
typeof process !== 'undefined' &&
|
|
((process.env && process.env.IGNORE_TEST_WIN32) ||
|
|
process.platform === 'win32')
|
|
) {
|
|
/* eslint no-control-regex: "off" */
|
|
const makePosix = (str) =>
|
|
/^\\\\\?\\/.test(str) || /["<>|\u0000-\u001F]+/u.test(str) ?
|
|
str
|
|
: str.replace(/\\/g, '/');
|
|
|
|
checkPath.convert = makePosix;
|
|
|
|
// 'C:\\foo' <- 'C:\\foo' has been converted to 'C:/'
|
|
// 'd:\\foo'
|
|
const REGIX_IS_WINDOWS_PATH_ABSOLUTE = /^[a-z]:\//i;
|
|
checkPath.isNotRelative = (path) =>
|
|
REGIX_IS_WINDOWS_PATH_ABSOLUTE.test(path) || isNotRelative(path);
|
|
}
|